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Seeing Is Believing - The Human Eye

written by: pantera182
 
Whether you stare or simply take a quick glimpse, your eyes serve an irreplaceable function. And further more, they are beautiful! Haven't you noticed?

Question 1:


What is the main function of the iris of the eye?
All of these
It protects the sclera from injuries.
It protects the lens from injuries.
It controls the amount of light that reaches the retina.

Question 2:


Where exactly is the retina of the eye positioned?
Right behind the pupil
Retina is a synonym of pupil.
Along the optic nerve.
It's lining the inner surface of the eye.

Question 3:


What part of the eye is usually referred to as 'the white of the eye'?
All of these
Conjunctiva
Sclera
Stroma

Question 4:


The cornea of the eye is the transparent front part that covers the iris, pupil, and anterior chamber. Which of these statements is true about the cornea?
The cornea does not have blood vessels.
It refract most of the light that enters the eye.
Touch of the cornea provokes an involuntary reflex to close the eyelid.
All of these

Question 5:


Why is the pupil of the eye black ?
The tissue right behind the pupil is black.
It contains black pigments.
Most of the light that enters the pupil is absorbed by the tissues inside the eye.
All of these

Question 6:


Conjunctivitis, referred to as "pink eye", is an inflammation of the conjunctiva of the eye. What may be the cause of such inflammation?
All of these
Viral infection
Bacterial infection
Allergic reaction

Question 7:


Which of the following statements is true about the eyelids?
The skin of the eyelids is one of the thinnest skin of the whole human body.
The skin of the eyelids contains more pigment cells compared to the rest of the skin on the body.
They protect the eye from drying out and from foreign objects.
All of these

Question 8:


At what stage of the development of the fetus do eyelashes form?
Between the 13th and 14th week
Between the 7th and 8th week
Around the 26th week
Around the 20th week

Question 9:


Which of these is a medical term that refers to crying?
Humoring
Lacrimation
Lactation
Blepharitis

Question 10:


The average size of a normal human eye is commonly compared to the size of this object.
Apricot
Cherry tomato
Golf ball
Walnut

 


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